Well I don't know exactly what the real name of it is, it came as a hitch hiker on some live rock a few yrs. Back. A fellow reefer told me it was called blue coral becuz when you break a piece off it's blue inside, I would love to know what the real name of it is. It's pretty cool stuff though. I would call it a type of sps because it has a hard skeleton and little feeder poylops come out of it. The thing that is cool about it is it grows with out high power lights, it has grown in two different tanks of mine, one with you standard t5's and one with 260of pc's. I was told by someone that it was kind of rare, but I don't know if they are right or not. If someone knows anything about it I would love too have some info on it, I can try too get some pics of it posted tonight.